The LM10 is not common today, but the circuit can be adapted to operate with equivalent components. The circuit is from the 1994 Linear Applications Handbook by National Semiconductor.
This circuit is from a Popular Electronics from the 90s. The integrated circuit admits equivalents...
This very interesting project was obtained in a 1980 publication. It consists of a device that is...
This circuit beeps when the sensor is triggered by the opening of the freezer door or other...